Anonymous wrote:Safeway. They are discounted if you have a Safeway club card.
I have 4 cartridges, so I wait until 3 are empty then do a swap of all 3 at once, as otherwise I need to visit the store every couple weeks (I pretty much only drink sparkling water)
Anonymous wrote:Google how to hook up a large scale CO2 tank to save a ton of money.
Anonymous wrote:Soda Sense